Opgaver til matrix algebra - Jesper Lund
Opgaver til matrix algebra - Jesper Lund
Opgaver til matrix algebra - Jesper Lund
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Excel udskrift af losning37.xls<br />
Opgave 1-1 Opgave 2-1<br />
Matrix A: Matrix B:<br />
3 0 0 6 2 1<br />
4 5 2 2 0 7<br />
3 1 8 8 2 8<br />
Determinant: 1) Beregn C = A'B<br />
114<br />
50 12 55<br />
Inverse <strong>matrix</strong> <strong>til</strong> A: 18 2 43<br />
68 16 78<br />
0.333333 0.000000 0.000000<br />
-0.228070 0.210526 -0.052632 2) Beregning af det(C)<br />
-0.096491 -0.026316 0.131579 det(C) = 0<br />
Inv(A)*det(A) = transponeret <strong>matrix</strong> af co-faktorer NB: dette er præcist 0, men Excel<br />
(laves alene for at checke manuelle beregninger) giver 1.0e-12 pga. afrundingsfejl<br />
38 0 0<br />
-26 24 -6<br />
-11 -3 15